I would encourage your teachers to work with their students to reflect upon the first semester and then work together to develop/update the classroom code of conduct as well as the disciplinary steps that will be posted within the classroom. It will remind the students of the expectations and if they feel that they are a stakeholder then they are more apt to buy in and follow the rules. *A word of caution- In my experience, the students will tend to make the rules/punishments much harsher than normal. Have the teachers curb their enthusiasm so that there are realistic expectations.